21305670112 has 12 divisors (see below), whose sum is σ = 41945538096. Its totient is φ = 10652835040.

The previous prime is 21305670097. The next prime is 21305670161. The reversal of 21305670112 is 21107650312.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332901064 + ... + 332901127.

It is an arithmetic number, because the mean of its divisors is an integer number (3495461508).

Almost surely, 2^21305670112 is an apocalyptic number.

It is an amenable number.

21305670112 is a deficient number, since it is larger than the sum of its proper divisors (20639867984).

21305670112 is an equidigital number, since it uses as much as digits as its factorization.

21305670112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 665802201 (or 665802193 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 28.

The spelling of 21305670112 in words is "twenty-one billion, three hundred five million, six hundred seventy thousand, one hundred twelve".